D27861: WIP: Rework xdg-shell implementation

zzag added a comment.


  | Toolkit | xdg-shell v6 | xdg-shell stable |
  | GTK     | 3.21.5       | 3.22.30          |
  | Qt      | 5.10         | 5.12             |
  |
  
  The table above shows when GTK and Qt gained support for xdg-shell v6 and xdg-shell stable.
  
  | Distribution (Release)           | GTK     | Qt     |
  | Ubuntu (18.04)                   | 3.22.30 | 5.9.5  |
  | Ubuntu (19.10)                   | 3.24.12 | 5.12.4 |
  | Debian (Buster)                  | 3.24.5  | 5.11.3 |
  | Debian (Sid)                     | 3.24.14 | 5.12.5 |
  | openSUSE (Tumbleweed 03/16/2020) | 3.24.14 | 5.14.1 |
  | openSUSE (Leap 15.1)             | 3.22.30 | 5.9.7  |
  | openSUSE (Leap 15.2)             | 3.24.14 | 5.12.7 |
  | Arch Linux (03/16/2020)          | 3.24.14 | 5.14.1 |
  | Fedora (Rawhide)                 | 3.24.14 | 5.13.2 |
  | Fedora (31)                      | 3.24.13 | 5.13.2 |
  |
  
  The table above shows GTK and Qt being shipped by major distributions.
  
  Given that KDE Plasma 5.19+ is going to depend on Qt 5.14+, I think we can safely drop support for xdg-shell v6.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D27861

To: zzag, #kwin
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